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  1. #include <iostream>
  2. #include <string>
  3.  
  4. struct TheMainClass
  5. {
  6.     struct AssignmentProxy
  7.     {
  8.         std::string name;
  9.         TheMainClass* main;
  10.  
  11.         AssignmentProxy(std::string const& n, TheMainClass* m)
  12.             : name(n), main(m)
  13.         {}
  14.  
  15.         TheMainClass& operator=(std::string const& s)
  16.         {
  17.             main->addString(name, s);
  18.             return *main;
  19.         }
  20.  
  21.         TheMainClass& operator=(int i)
  22.         {
  23.             main->addInteger(name, i);
  24.             return *main;
  25.         }
  26.     };
  27.  
  28.     AssignmentProxy operator[](std::string const& name)
  29.     {
  30.         return AssignmentProxy(name, this);
  31.     }
  32.  
  33.     void addString(std::string const& name, std::string const& str)
  34.     {
  35.         std::cout << "Adding string " << name << " with value \"" << str << "\"\n";
  36.     }
  37.  
  38.     void addInteger(std::string const& name, int i)
  39.     {
  40.         std::cout << "Adding integer " << name << " with value " << i << "\n";
  41.     }
  42. };
  43.  
  44. int main(int argc __attribute__((unused)), char *argv[] __attribute__((unused)))
  45. {
  46.     TheMainClass builder;
  47.     builder[ "string_value" ] = "Hello";
  48.     builder[ "int_value" ] = 5;
  49.     builder[ "another_string" ] = "Thank you";
  50. }
  51.  
Success #stdin #stdout 0s 3456KB
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Standard input is empty
stdout
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Adding string string_value with value "Hello"
Adding integer int_value with value 5
Adding string another_string with value "Thank you"
https://ideone.com/HSSAni
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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